Don't modify the Builder prefix if reinvoking suggestName on a Data (backport #2789) (#2790)

* Only set the chisel3 Builder prefix during the first invocation of suggestName

(cherry picked from commit b684506a)

# Conflicts:
#	core/src/main/scala/chisel3/internal/Builder.scala

* Add simple test to show bug fix

(cherry picked from commit 255068b1

)

* Fix merge conflict

* Fix test to not use Hardware inside a bundle for prefixing

Co-authored-by: Jared Barocsi <jared.barocsi@sifive.com>